Device for continuous production of sheet metal

ABSTRACT

In a device for continuously producing metal sheet by solidifying molten metal on the outer periphery of two adjacent rolls and drawing the so solidified sheet from the nip of these two rolls, the improvement being discs located about the necks of the rolls where the roll necks project through the wall of the bath. These discs are biased towards the end face of the rolls, preferably by coil springs. Furthermore, the contacting face of the discs extends beyond the working surface of the rolls so as to form the longitudinal edges of the solidified sheet.

United States Patent [72] Inventors Georgy Lukich Khimich;

Vitaly Maximovich Niskovskikh; Stanislav Evgenievich Karlinsky, Sverdlovsk, U.S.S.R.

[211 App]. No. 749,068

[22] Filed July 31, 1968 [45] Patented Feb. 23, 1971 [73] Assignee Uralsky Zavod 'Iyazhelogo mashinostroenia imeni Ordzhonikidze Sirerdlovsk, U.S.S.R.

[54] DEVICE FOR CONTINUOUS PRODUCTION OF SHEET METAL 2 Claims, 2Drawing Figs. [52] 0.5. CI. 1647273 18/9; 100/155 [51] Int. Cl. 822d 11/06 [50] Field ofSearch 164/277,

154, 278, 87; 18/12 (DR), 12 (DS), 12 (R), 13

10l/(1nquired); 25/5, 20, 21, 76, 77; 29/(lnquired) 56] References Cited UNITED STATES PATENTS 49,053 7/1865 Bessemer 164/87 616,777 12/1898 Fordyce 100/163X 2,171,132 8/1939 Simons l64/277X 2,332,759 10/1943 Schwarz 164/154X 2,904,829 9/1959 Heck 18/9 3,242,530 3/1966 Hirsch 18/9 Primary Examiner-Charles W. Lanham Assistant Examiner-John S. Brown Attorney-Waters, Roditi, Schwartz & Nissen ABSTRACT: In a device for continuously producing metal sheet by solidifying molten metal on the outer periphery of two adjacent rolls and drawing the so solidified sheet from the nip of these two rolls, the improvement being discs located about the necks of the rolls where the roll necks project through the wall of the bath. These discs are biased towards the end face of the rolls, preferably by coil springs. Furthermore, the contacting face of the discs extends beyond the working surface of the rolls so as to form the longitudinal edges of the solidified sheet.

DEVICE FOR CONTINUOUS PRODUCTION OF SHEET METAL This invention relatesto the fieldof continuous casting of metal and more particularly to devices for continuous production of sheet metal. I e f j Known at present are devices for continuous production of metal strip, said devices comprising a bath intended for molten metal and rotary water-cooled rolls immersed in said bath and provided with seals at the end faces.

in the conventionally known devices of this type the end faces of the rolls are sealed by means of the bath walls lined with refractory material. However, in the devices of this design clearances are formed between the end, faces of the rolls and thebath walls, as a result of wall wear caused by the rotation of the. rolls, which causes theingress of molten metal into said clearances thus hampering the operation of the device as a whole. 1

Besides, due to different conditions of heat transfer along the line of division between the surface of the water-cooled rolls and the molten metal, on one, hand, and between the surface of the bath walls and the moltenmetal, on the other hand, the process of metal crystallization on the above-mentioned surfaces takes place at different speeds which adversely affects the quality of the processed sheet edge.

An object of the invention is to provide a device for continuous production of sheet metal, ensuring a higher reliability ofoperation. f' V 7 .Another important object of the invention is to provide a device for continuous production of sheet metal ensuring an improvement of the sheet edge quality. I

These and other objects of the invention have been achieved by providing a device for continuous production of sheet metal, comprising a bath for molten metal and rotary water-cooled rolls arranged in pairs, rotating in opposite directions, provided with end face seals'and immersed in said bath. According to this invention, with the purpose of sealing the end I faces of the rolls the holes in the bath walls are equipped with discs provided with means for their constant pressing against the end faces of the-rolls, the working surfaces of the discs projecting beyond the working surfaces of the rolls so that crystallization of metal on the surfaces the rolls takes place between the working surfaces of the discs.

Other objects of the invention will be apparent from the following description in connection with which certain embodiments of the invention have been shown in the accompanying drawing in which:

FIG. I is a general layout of the device according to this invention, presented in a longitudinal section;

FIG. 2 is a partial section taken along the lines ll-ll of H6.

The device for continuous productionof sheet metal comprises abath 1 (FIG. 1) intended for molten metal 2 and rotary water-cooled rolls 3 and 4 immersed in the molten metal,

the crystallization of molten metal taking place on the working .and 4.

This means 11 for holding the discs 10 against the end faces of the rolls 3 and 4 takes the fonn of a spring 12 installed between the discs 10 and a stop 13. The employment of the spring-loaded discs 10 ensures the production of sheets with high standard edges and eliminates the possibility of gap formation between the working surfaces of the discs and the end faces of the rolls in the course of their gradual wear.

The discs 10 can be made water cooled with the purpose of improving the quality of the sheet edges. The working surfaces 14 of the discs 10 project beyond the working surfaces 5 and 6 of the rolls 3 and 4 by an amount a, in order that crystallization of metal on the surfaces 5 and 6 of the rolls would take place between the working surfaces I4 of the discs 10.

The amount a corresponds to the thickness of the metal crystallization on the surfaces 5 and 6 of the water-cooled rolls 3 and 4.

The crystallized metal in the form of a finished sheet 15 is discharged between the rolls 3 and 4 from the bath 1.

The device operates as follows. Crystallization of molten metal takes place on the surfaces 5 and 6 of the rolls 3 and 4 as well as on the working surfaces 14 of the discs 10.

The springs 12 are constantly pressing the discs 10 against the end faces 7 and 8 of the rolls 3 and 4, thus preventing a gap from occurring between the discs and rolls which ensures a higher quality of the sheet edges and improves the reliability of operation of the device.

Besides, crystallization of molten metal on the projecting working surfaces 14 of the discs 10 additionally contributes to the provision of a high standard edge in the processed sheet We claim:

1. A device for continuous production of sheet metal com prising: a bath intended for molten metal; rotary water-cooled rolls arranged in pairs, rotating in opposite directions and immersed in said bath, said rolls being intended for crystallization of metal on their surfaces and for the discharge of a processed sheet from said bath; walls of said bath defining holes; discs located in said holes with the purpose of sealing the end faces of said rolls; means for constantly pressing said discs against the end faces of said rolls; the working surfaces of said discs projecting beyond said working surfaces of the rolls in order that crystallization of molten metal on said working surfaces of the rolls will take place between said working surfaces of said discs.

2. A device as claimed in Claim 1 wherein one end of each said roll passes through one hole and said means for constantly pressing said discs consist of a coil spring coaxial the axis of each roll, said spring being compressed between a fixed stop and one of said movable discs. 

2. A device as claimed in Claim 1 wherein one end of each said roll passes through one hole and said means for constantly pressing said discs consist of a coil spring coaxial the axis of each roll, said spring being compressed between a fixed stop and one of said movable discs. 